I bought a SO 7 pin pick and bought a bunch of cheap old locks at a local flea market to practice on(I got a box of 50 for $5). I was able to open some of the locks with the normal imp. methods, but some of them I think are better locks with tighter tolerances and probably mushroom pins or something like that. So then I tried applying torque to the tool while i tried single pin picking them with the feelers(tension on the feelers was left completely loose). I started on the pins that were tight first, and tried working my way around getting tight pins to seat to shear line, but I keep having loose pins, meaning I'm not successfully getting tight pins at shear line(and am not sure what i should be looking for verifying they are on the shear line). Am I applying too much torque to the tool and causing security pins to falsely bind on shear line(what could be a good gauge of pressure for how much pressure i should be putting)? Will pins make a pop noise once they hit the shear line? How do i know that the stiff pins hit the shear line? I spent many hours yesterday trying everything I could to try and make it work with no luck.
On a side note, with normal imp. methods, it seems like i would crank down the pin tension and it would keep the higher variable tension in check and give pins with less spring pressure time to hit the shear line, but I can't make that method work either.
Any ideas or suggestions would be much appreciated.